/* ===== 从 login.php 提取的第 1 块 ===== */
/* 背景：渐变+工厂元素，好看不单调 */
        body {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #667eea 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
            position: relative;
            overflow-x: hidden;
        }
        /* 背景装饰圆圈 */
        body::before, body::after {
            content: '';
            position: fixed;
            border-radius: 50%;
            opacity: 0.08;
            background: #fff;
        }
        body::before { width: 500px; height: 500px; top: -150px; left: -150px; }
        body::after  { width: 600px; height: 600px; bottom: -200px; right: -200px; }

        /* 登录卡片 */
        .login-wrap { width: 100%; padding: 20px; z-index: 2; }
        .login-card {
            max-width: 420px;
            margin: 0 auto;
            border-radius: 18px;
            box-shadow: 0 25px 80px rgba(0,0,0,0.25);
            background: #fff;
            overflow: hidden;
        }
        /* 卡片顶部LOGO区 */
        .login-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #fff;
            padding: 36px 30px 30px;
            text-align: center;
            position: relative;
        }
        .login-header .logo-icon {
            width: 72px; height: 72px;
            border-radius: 20px;
            background: rgba(255,255,255,0.2);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 38px;
            margin-bottom: 14px;
            backdrop-filter: blur(10px);
        }
        .login-header h2 { font-size: 22px; font-weight: bold; margin: 0 0 5px; }
        .login-header p { opacity: 0.9; margin: 0; font-size: 13px; }

        /* 表单样式美化 */
        .login-body { padding: 30px; }
        .input-group-text {
            background: #f8f9fa;
            border-right: 0;
            color: #667eea;
        }
        .form-control {
            border-left: 0;
            padding-left: 10px;
        }
        .form-control:focus {
            box-shadow: 0 0 0 .2rem rgba(102,126,234,.15);
            border-color: #667eea;
        }
        .btn-login {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border: none;
            font-weight: bold;
            padding: 12px;
            font-size: 16px;
            border-radius: 10px;
            transition: all 0.3s;
        }
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102,126,234,0.35);
        }
        .info-tip {
            background: #f0f4ff;
            border-left: 4px solid #667eea;
            color: #555;
            font-size: 13px;
            padding: 10px 14px;
            border-radius: 0 8px 8px 0;
            line-height: 1.7;
        }